Use `clone_from` from `hashbrown::{HashMap,HashSet}`.#80400

Merged

bors merged 1 commit intorust-lang:masterfrom adlerd:hashclone

Dec 27, 2020

+35-2

Commits on Dec 27, 2020

Use the hashbrown::{HashMap,HashSet} clone_from impls.
David Adler
committed